页面代码: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></div> </form></body></html> 后台代码: using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls; public partial class Default2 : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { ScriptManager1.RegisterAsyncPostBackControl(Button1); //指定Button1是异步刷新控件 UpdatePanel up = new UpdatePanel(); up.ID = "up1"; up.UpdateMode = UpdatePanelUpdateMode.Conditional; //指定更新模式 Label lbl = new Label(); lbl.ID = "lbl1"; lbl.Text = "www"; up.ContentTemplateContainer.Controls.Add(lbl); up.ContentTemplateContainer.Controls.Add(TextBox1); Page.Form.Controls.Add(up); } protected void Button1_Click(object sender, EventArgs e) { ((Label)Page.Form.FindControl("lbl1")).ForeColor = System.Drawing.Color.Red; TextBox1.Text = "我有名字了"; ((UpdatePanel)Page.Form.FindControl("up1")).Update(); ScriptManager.RegisterClientScriptBlock(Page, GetType(), "Open", "alert('Server')", true); }}
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